#include <cstdio>


const int& add(int& res, const int& op1, const int& op2) {
    res = op1 + op2;
    return res;
}

int main(){
    int a = 3, b=4;

    printf("The results is: %d \n", add(a,b,a));
    printf("Now, a is: %d \n", a);

    return 0;

}
